Sawing-machine.



PATENTED MAR. 10, 1903.

J. R. THOMAS. SAWING MACHINE.

APPLICATION FILED JUNE 3, 1901.

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No. 722,335. P ATEN-TB-D MAR. 10, 1903.

J. R. THOMAS. SAWING MACHINE.

- APPLICATION I'ILBD JUNE 3, 1901. H0 MODEL. 2 SHEETS-SHEET 2.

0 6 7 m 09 f 363 H9a Ill)!- l 1, 7 l 29 I q 79 m QM llirnn JOHN R. THOMAS, OF CINCINNATI, OHIO.

SAWlNG-MACHINE.

SPECIFICATION forming part of Letters Patent No. 722,335, dated March 10, 1903.

Application filed June 3, 1901- T0 (t6! whom it may concern:

Be it known that 1, JOHN R. THOMAS, a citizen of the United States, residing at Cincinnati, in the county of Hamilton, State of Ohio, have invented certain new and useful Improvements in Sawing-Machines, of which the following is a specification.

My invention relates to sawing-machines; and it consists in the parts and in the construction, arrangement, and combinations of parts hereinafter more fully described and claimed.

In the drawings, Figure 1 is a side elevation of my improved device. Fig. 2 is a plan View of the same with the column and superimposed parts broken away for better illustration of the feed-works. is an end elevation of the same. Fig. 4 is an enlarged detail in plan view of the feed-roll-shifting mechanism. Fig. 5 is an end elevation of a detail of the same.

A represents the frame of the machine, which may support a column B, having a bracket O, upon which latter a saw-guide D for a saw-blade E may be adjustably mounted in suitable manner. The frame carries a feed-roll saddle F. The saddle F is given an adjustment on the frame on way 1 for angling the feed-rolls G with relation to the sawblade. This adjustment may be made by means of ascrew-shaft 2, having a hand-wheel 3, and screwing into a nut 4, pivoted on a bracket 5, secured to the frame, the other end of the screw-shaft being collared about pivoted bearings 6 in a lug 7, attached to the saddle. When the hand-wheel is turned, the feed-rolls are adjusted into or out of angling position with relation to the saw-blade. The saddle carries a pair of slides H H, one at each side of the saw-blade and each having an upright 11 and carrying a feed-roll housing 12, swinging on a shaft 13, journaled in the slide and upright. Each shaft 13 carries a pinion 14 at its upper end and a bevel-wheel 15 at its lower end. On each slide the feed rolls G have their shafts 16 journaledin bearings of housing 12, which shafts carry gears 17, meshing with the pinion 14 for imparting motion to the rolls from the shaft 13. Each of the bevel-wheels 15 meshes with a bevelwheel 21, splined to a shaft 22, journaled in the saddle and carrying a worm-wheel 23,

Serial No. 62,996. (No model.)

slide also carrying a rack 38 for receiving a catch 39 on the lever, the catch connecting with a stem 40 and arranged to engage the rack through pressure of a spring 42. The handle of the lever and the stem are so arranged that when the handle is gripped the catch 39 will be released from the rack. A nut 46 is pivoted to the lever 36 by pivot 47 and receives an adjusting screw 48. The slide H has an adjusting-screw 56, screwing into a lug 57.

An equalizing-lever 66 is secured to a shaft 67, to which an arm 68 is secured, connecting with a pressure-lever 69 by means of a link 70. The pressure-lever may carry a weight 71. The lever 66 makes connection with the adjusting-screws 48 and 56 for exerting pressure against the feed-rolls from the pressure device, as by having fingers 74 75 of the equalizing-lever take against shoulders 76 77 on the adjusting-screws 48 and 56. The shoulders may take the form of collars or nuts, with a jam-nut 78 for further security. A finger or fingers 79 or suitable holding device is also secured to the saddle for receiving the or other turning mechanism. The fingers may form recesses 83 84 85 for receiving the adjusting-screws, with the collars on the latter taking against the fingers for permitting the screws to turn while the fingers control their endwise movement. The fingers may also have their side faces rounded, as shown at 89, so that a snug fit may be had between the fingers and the shoulders on the adjusting-screws throughout the various relative positions of the screws and the fingers.

When the adjusting-shafts 48 and 56 are in engagement with the equalizing-lever 66, pressure exerted upon the feed-rolls G will cause the feed-rolls on each side of the sawblade to yield to equal extent against the force exerted by the weight 71, for a yield of the rolls on either side of the saw-blade will cause the lever 66 to rock upon its axis, conveying a corresponding movement to the rolls on the other side of the saw-blade. As heretofore explained, the lever 66 is pivoted to the saddle, while the slides with which the screw-shafts connect and which carry the rolls slide upon the saddle. If it is desired to stationarily set the rolls on one side of the saw-bladefor instance, those on the slide Hpin 80 is removed from its aperture in the finger 75, which permits the release of the adjusting-screw 48 from the finger, and the adjusting-screw 48 is slipped sidewise into engagement with the finger 79 and the pin 80 placed in the apertu re in that finger for retaining the adj listing-screw in place. The finger 79 is unyielding with relation to the saddle, and therefore holds the slide H in rigid position with relation to the saddle and sets the rolls on that slide against yield, while the rolls on the other slide are still permitted to yield and force the stock toward the stationarilyset rolls for sawing stock of predetermined thickness. When the adjusting-screw is in engagement with the finger 79, the machine is set for whatis known as slabbing or cutting boards of predetermined thickness from the stock, which thickness is readily and conveniently adjusted by shifting the lever 36 along the rack 38 and bringing the same in engagement with any desired teeth along that rack, which teeth are graded for difierent Widths of cut, as in one-half or one-fourth inches. When the adjusting-screw 48 is in engagement with the finger 75 the machine is set for center sawing, in which the saw cuts through the middle of the stock, the rolls on both sides of the stock yielding to equal extent to any inequality in the stock for presenting the middle of the stock continuously to the sawblade. It will be seen that the transfer from one kind of sawing to the other may be readily made by very simple manipulation of parts conveniently located and with little movement. The rolls maybe set to desirable points away from the saw-blade by manipulation of the adjusting-screws, the adjustment by means of the shifting-lever 36 being additional adjustment. A support 87 is provided for the stock while being fed through the machine.

In machines of this character it is frequently desirable to set the rolls at an angle to the perpendicular, so as to cut the stock at an angle to its face-for instance, in making siding. To accomplish this without change in the driving mechanism for the feedrolls, I provide the following system of belting: To the lower saw-wheel mandrel I secure a cone or other pulley 90. To a shaft 91 at the side of the frame I secure a pulley 92, and to a shaft 93 I secure a pulley 94. A belt 95 passes over the pulley 90, thence over pulley 94, thence over pulley 26, thence over pulley 92, and again to pulley 90. The pulley 26 being within the loop formed by the belt in passing over pulley 94 to pulley 92 permits the raising or lowering of. the pulley 26 without materially affecting the tension of the belt, the tension of the belt throughout the adjustments being in practice sufficient for driving the feed without undue strain upon the belt in the adjustment.

My improvement provides novel feeding mechanism in a resawing-machine.

I claim 1. In a feeding mechanism for a resaw, the combination of a feed-roll slide on each side of the saw blade position, an equalizer, a screw-shaft for each slide connecting the slide with said equalizer, a rigid connection for a screw-shaft, means for permitting selective connection of said screw-shaft with said rigid connection or said equalizer, and a shiftinglever for the shaft moving the feed-roll slide.

2. Ina feeding mechanism fora resaw, the combination of a feed-roll slide on each side of the saw-blade position, an equalizer, an adjusting connection for each slide connecting the slide with said equalizer, a rigid connection for an adjusting connection, means for permitting selective connection of said adjusting connection with said rigid connection or said equalizer and a shifting-lever for an adjusting connection moving a feed-roll slide.

3. In a sawing-machine, the combination of a pair of feed-roll slides, with an adjustingrod extending from each, an equalizing-lever connecting with both adjusting-rods, and a rigid connection and a shifting-lever connecting with an adjusting-rod, with the shifting-lever constructed for moving a slide and means for permitting shifting the connection of the latter rod between the equalizing-le- Ver and the rigid connection.

4. Inasawing-machine, the combination of a frame, a saddle, a pair of feed-roll slides with feed-rolls therefor on the saddle,a screwshaft connecting with each slide, an equalizing-lever connecting with both screw-shafts, means for permitting the release of the connection between a screw-shaft and the equalizing-lever, means adjacent to the equalizing-lever for receiving the screw-shaft for holding the screw-shaft rigid with relation to the saddle, and a shifting-lever connecting with the latter screw-shaft for positioning the slide upon the saddle, substantially as described.

5. In a sawing-machine the combination of IIO a frame, a saddle, a pair of feed-roll slides with feed-rolls therefor, a screw-shaft connecting with each slide, with an adjustinglever connecting with a screw-shaft, and means for positioning the adj usting-lever for setting the slide to position, with an equalizing-lever and a separate connection adjacent thereto on the saddle for a screw-shaft, substantially as described.

6. In asawing-machine, the combination of a frame, a saddle, a pair of feed-roll slides on the saddle, an adjusting-rod connecting with each slide, an equalizing-lever pivoted to the saddle and connecting with both rods, with a connection for a rod for holding the same rigid with relation to the saddle, and ashifting-lever on a slide for said rod for positioning said slide on the saddle, substantially as described.

7. In a sawing-machine the combination of a frame, a pair of feed-roll slides, adjusting means extending from each, a rocking lever connecting with both the said adjusting means and a separate connection for an adjusting means rigid with relation to the frame and located adjacent to the rocking lever, with means for permitting disengagement of said adjusting means from either the rocking lever or said separate connection, means for permitting sidewise movement of the adjusting means, with said adjusting means extending in a direct line from the feed-roll slide to said rocking lever and to said separate connection, respectively, and means for engaging the latter with either the rocking lever or separate connection, substantially as described.

8. In a sawing-machine the combination of a frame, a pair of slides with feed-rolls mounted on each slide, and an adjusting-rod connecting with each slide, an equalizing-lever connecting with both rods, and a tension device connecting With the equalizing-lever, constructed for thrusting the slides with their rolls toward each other and for permitting the rolls to yield equal distances, means for releasing connection between a rod and the equalizing-lever, with a connection between the frame and the adjusting-rod constructed for receiving the rod when disengaged from the equalizing-lever for holding the slide and rolls rigid with relation to the frame, and a shifting-lever connecting with the adjustingrod for positioning the slide with relation to the frame, substantially as described.

9. In a sawing-machine the combination of a frame, a saddle, a pair of feed-roll slides with feed-rolls therefor on the saddle, a screw-shaft connecting with each slide, an equalizing-lever connecting with both screw-shafts, means for permitting the release of the connection between a screw-shaft and the equalizing-lever, means adjacent to the equalizing-lever for receiving the screw-shaft for holding the screw-shaft rigid with relation to the saddle, with a lever connecting with the latter screwshaft for positioning the slide upon the saddle, substantially as described.

10. In a sawing-machine the combination of a frame, asaddle, a pair of feed-roll slides with feed-rolls therefor on the saddle, a screw-shaft connecting with each slide, an equalizing-lever connecting with both screw-shafts, means for permitting the release of the connection between a screw-shaft and the equalizing-lever, means adjacent to the equalizing-lever for receiving the screw-shaft for holding the screw-shaft rigid with relation to the saddle, with a lever connecting with the latter screwshaft for positioning the slide upon the saddle, and a rack and pawl for positioning the lever, substantially as described.

In testimony whereof I have signed my name hereto in the presence of two subscribing witnesses.

JOHN R. THOMAS.

Witnesses:

J. CASSIDY GRIMES, PHILIP TOZZER. 

